Page 198 - Mathematics

7. (a) y

12
(6, 12)
10

8
y = 2x
6

4 (2, 4)
Tanzania Institute of Education
2

-4 -2 0 2 4 6 8 x

-2

-4

(b) (i) Gradient is 2 which signifies that 2 acres farm uses 1 bag of fertilizer

(ii) y = 2x and x and y-intercepts are (0, 0)
(c) (i) Nyanda will need 12 bags of fertilizer
(ii) The size of Myoma farm is 150 acres

Exercise 6.4

1. (a) 3x y+− 10 0= (c) y − 40= (e) 3x − 5y + 14 0=

50
(b) x y+ −= (d) x − 5y − 19 0=
3. (a) 5x y−− 14 0= (c) 11x − 3y − 39 0=

(b) 3x + 5y − 7 14 0= 11 (d) x + 5y − 20=
Mathematics Form One 5. (a) y = − − 2x − 5, , m = − and 0, 4  
7
11

x +

4
4
4


14
14
x +
4, m = −
(b) y =
and (0, 4)
3
3
5)
(c) y =
=
2 and (0, −
192
25/10/2024 09:52:24
Mathematics form 1.indd 192 25/10/2024 09:52:24
Mathematics form 1.indd 192